/*
 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
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 *
 *
 *
 *
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 *
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 *
 *
 *
 *
 *
 *
 *
 */

package javax.naming.spi;

import java.util.Hashtable;
import javax.naming.*;

/**
 * This class is for dealing with federations/continuations.
 *
 * @author Rosanna Lee
 * @author Scott Seligman
 * @since 1.3
 */

class ContinuationContext implements Context, Resolver {

  protected CannotProceedException cpe;
  protected Hashtable<?, ?> env;
  protected Context contCtx = null;

  protected ContinuationContext(CannotProceedException cpe,
      Hashtable<?, ?> env) {
    this.cpe = cpe;
    this.env = env;
  }

  protected Context getTargetContext() throws NamingException {
    if (contCtx == null) {
      if (cpe.getResolvedObj() == null) {
        throw (NamingException) cpe.fillInStackTrace();
      }

      contCtx = NamingManager.getContext(cpe.getResolvedObj(),
          cpe.getAltName(),
          cpe.getAltNameCtx(),
          env);
      if (contCtx == null) {
        throw (NamingException) cpe.fillInStackTrace();
      }
    }
    return contCtx;
  }

  public Object lookup(Name name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.lookup(name);
  }

  public Object lookup(String name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.lookup(name);
  }

  public void bind(Name name, Object newObj) throws NamingException {
    Context ctx = getTargetContext();
    ctx.bind(name, newObj);
  }

  public void bind(String name, Object newObj) throws NamingException {
    Context ctx = getTargetContext();
    ctx.bind(name, newObj);
  }

  public void rebind(Name name, Object newObj) throws NamingException {
    Context ctx = getTargetContext();
    ctx.rebind(name, newObj);
  }

  public void rebind(String name, Object newObj) throws NamingException {
    Context ctx = getTargetContext();
    ctx.rebind(name, newObj);
  }

  public void unbind(Name name) throws NamingException {
    Context ctx = getTargetContext();
    ctx.unbind(name);
  }

  public void unbind(String name) throws NamingException {
    Context ctx = getTargetContext();
    ctx.unbind(name);
  }

  public void rename(Name name, Name newName) throws NamingException {
    Context ctx = getTargetContext();
    ctx.rename(name, newName);
  }

  public void rename(String name, String newName) throws NamingException {
    Context ctx = getTargetContext();
    ctx.rename(name, newName);
  }

  public NamingEnumeration<NameClassPair> list(Name name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.list(name);
  }

  public NamingEnumeration<NameClassPair> list(String name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.list(name);
  }


  public NamingEnumeration<Binding> listBindings(Name name)
      throws NamingException {
    Context ctx = getTargetContext();
    return ctx.listBindings(name);
  }

  public NamingEnumeration<Binding> listBindings(String name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.listBindings(name);
  }

  public void destroySubcontext(Name name) throws NamingException {
    Context ctx = getTargetContext();
    ctx.destroySubcontext(name);
  }

  public void destroySubcontext(String name) throws NamingException {
    Context ctx = getTargetContext();
    ctx.destroySubcontext(name);
  }

  public Context createSubcontext(Name name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.createSubcontext(name);
  }

  public Context createSubcontext(String name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.createSubcontext(name);
  }

  public Object lookupLink(Name name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.lookupLink(name);
  }

  public Object lookupLink(String name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.lookupLink(name);
  }

  public NameParser getNameParser(Name name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.getNameParser(name);
  }

  public NameParser getNameParser(String name) throws NamingException {
    Context ctx = getTargetContext();
    return ctx.getNameParser(name);
  }

  public Name composeName(Name name, Name prefix)
      throws NamingException {
    Context ctx = getTargetContext();
    return ctx.composeName(name, prefix);
  }

  public String composeName(String name, String prefix)
      throws NamingException {
    Context ctx = getTargetContext();
    return ctx.composeName(name, prefix);
  }

  public Object addToEnvironment(String propName, Object value)
      throws NamingException {
    Context ctx = getTargetContext();
    return ctx.addToEnvironment(propName, value);
  }

  public Object removeFromEnvironment(String propName)
      throws NamingException {
    Context ctx = getTargetContext();
    return ctx.removeFromEnvironment(propName);
  }

  public Hashtable<?, ?> getEnvironment() throws NamingException {
    Context ctx = getTargetContext();
    return ctx.getEnvironment();
  }

  public String getNameInNamespace() throws NamingException {
    Context ctx = getTargetContext();
    return ctx.getNameInNamespace();
  }

  public ResolveResult
  resolveToClass(Name name, Class<? extends Context> contextType)
      throws NamingException {
    if (cpe.getResolvedObj() == null) {
      throw (NamingException) cpe.fillInStackTrace();
    }

    Resolver res = NamingManager.getResolver(cpe.getResolvedObj(),
        cpe.getAltName(),
        cpe.getAltNameCtx(),
        env);
    if (res == null) {
      throw (NamingException) cpe.fillInStackTrace();
    }
    return res.resolveToClass(name, contextType);
  }

  public ResolveResult
  resolveToClass(String name, Class<? extends Context> contextType)
      throws NamingException {
    if (cpe.getResolvedObj() == null) {
      throw (NamingException) cpe.fillInStackTrace();
    }

    Resolver res = NamingManager.getResolver(cpe.getResolvedObj(),
        cpe.getAltName(),
        cpe.getAltNameCtx(),
        env);
    if (res == null) {
      throw (NamingException) cpe.fillInStackTrace();
    }
    return res.resolveToClass(name, contextType);
  }

  public void close() throws NamingException {
    cpe = null;
    env = null;
    if (contCtx != null) {
      contCtx.close();
      contCtx = null;
    }
  }
}
